Preliminary geological route selection research on the controlling section of the 2nd route of Xinjiang-Tibet highway

The Kuyake Canyon is a controlling section of the second line of the Xinjiang-Tibet Highway. The canyon is a fault basin formed by multiple periods of left-lateral strike-slip on the southern edge of the Altun Mountains fault, has extremely complex geological structures and a variety of adverse geological phenomena. Through the process of analysing obscure and symptomatic undesirable geological phenomena, we summarized the ideas for geological alignment selection of strategic highways in high- altitude uninhabited areas, that is, taking highway construction goals as the premise, long-term operational safety as the foundation, and quick repairs as the core. According to the sensitivity of the highway to adverse geology, comprehensive consideration, retaining the big and letting go of the small, to ensure the achievement of the highway construction goals.